Motorola Mobility LLC

Motorola Corporation

Google Inc.

Bradley F Jentz

Michael F Coulas

Robert Horvath

Apostolis K Salkintzis

Francis R Yester, Jr

State machine diagram () illustrates inactive connection () management wherein all bindings are deregistered, but active sessions remain. The mobile station may, re-register the connection (), to stop the Linger Timer () and return the connection to the active state () before timeout, or otherwise before the inactive connection is terminated. Otherwise, the Linger Timer may be stopped when the last active session is moved to a different connection, or released (). If the Linger Timer times out (), any active sessions will be released without the explicit action of the mobile station. In the active state (), if all bindings are deregistered and no active sessions are present, the connection may be terminated immediately as in (), without invoking the Linger Timer. Thus, the mobile station has an opportunity to take action regarding remaining sessions, such as releasing or refreshing on a different but active connection.

Method and apparatus for management of inactive connections for service continuity in an agnostic internet protocol multimedia communication system

In order to facilitate a handoff of a communication session between a legacy circuit switched network and a packet data network such as a 3GPP LTE, 3GPP2 UMB, or WiMAX network, which communication session is anchored in an IMS Voice Call Continuity Application Server (VCC AS), a Circuit Switched Proxy (CS Proxy) is provided in the packet data network that communicates with a Mobile Switching Center (MSC) of the circuit switched network. The CS Proxy allows the packet data network to communicate with the VCC AS, the MSC to communicate with the packet data network, and the MSC to communicate with the VCC AS via the packet data network, thereby allowing an exchange of handoff-related information between the packet data network and the VCC AS, the packet data network and the circuit switched network, and the circuit switched network and the VCC AS via the packet data network.

Method and apparatus for inter-technology handoff of a user equipment

Multimedia IMS communications are established by matching callee capabilities with caller preferences and identifying a URI parameter in response thereto. When a session initiation protocol (SIP) request identifying caller preferences for an internet communication session and an identified callee is received (), a determination is made of whether the identified callee is a registered address of record (AOR) or not (). If the identified callee is a registered AOR (), a uniform resource identifier (URI) parameter and a globally routable user agent URI (GRUU) associated with callee capabilities are identified (). The URI parameter is used to create a modified SIP including the URI parameter () for sending () to an IMS enabled wireless communication device ().

Method and apparatus for identifying caller preferences matched to callee capabilities for IMS communications

Method and apparatus for management of inactive connections for service continuity in an agnostic access internet protocol multimedia communication

Active sessions and dialogs may be moved between connections and P-CSCFs. For example, in some embodiments either new bindings may be created with a different connection for a Public User ID or the UE may re-register one or more specific bindings for a Public User ID from one connection to another. The capabilities improve service continuity when handing over between IP-CANs. FIG.illustrates exemplary messaging for moving bindings to a new connection for a Private User ID between UE () and P-CSCF () when the UE () is in a visited IP-CAN, that is, visited network (). The UE () invokes the unprotected global seamless re-registration of the embodiments via an unprotected initial registration procedure wherein the UE () includes a 'seamless-ims' parameter in the Require and Proxy-Require headers of the REGISTER request (). The S-CSCF () provides the capability to subsequently re-register bindings over new or existing connections.

Method and apparatus for re-registration of connections for service continuity in an agnostic access internet protocol multimedia communication system

A single substantially non-programmable fully integrated circuit for a digital frequency modulated discriminator is provided whereby frequency variations of a digitized frequency modulated information signal are linearly converted to amplitude variations. Matched pairs of data words from the digitized information signal are used to obtain a phase octant, one of eight equal sectors of the 360 degree spectrum. Further manipulations of the pairs of data words provide a coarse phase measurement, being some integral multiple of .pi./2, and a fine phase correction factor less than or equal to .pi./4 radians. The coarse phase measurement is combined with the fine phase correction factor. The sum is differentiated and demodulated, yielding the original information signal.

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Barrington, IL, United States of America

Bradley F Jentz